/* ==========================================================
   AgencyOS - Shared Button Components

   Consolidated button styles from public-shared.css,
   portal-shared.css, public-book.css, and
   portal-calendar-modals.css.

   Eliminates ~100 lines of duplication.
   ========================================================== */

/* ========================================
   BASE BUTTON STYLES
   ======================================== */

/**
 * Base button class
 * All buttons should use this as foundation
 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius-xl);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition-base);
  min-width: 120px;
  white-space: nowrap;
  user-select: none;
}

.btn:focus {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* ========================================
   BUTTON VARIANTS - COLORS
   ======================================== */

/**
 * Primary button - brand color
 * Use for main actions (submit, save, confirm)
 */
.btn--primary,
.btn-primary {
  background: var(--c-brand);
  border-color: var(--c-brand);
  color: var(--c-white);
}

.btn--primary:hover,
.btn-primary:hover {
  background: var(--c-mid);
  border-color: var(--c-mid);
}

.btn--primary:active,
.btn-primary:active {
  background: color-mix(in srgb, var(--c-brand) 80%, black);
  border-color: color-mix(in srgb, var(--c-brand) 80%, black);
}

/**
 * Secondary button - neutral/outline style
 * Use for cancel, back, secondary actions
 */
.btn--secondary,
.btn-secondary {
  background: var(--c-white);
  border-color: var(--c-gray-300);
  color: var(--c-gray-700);
}

.btn--secondary:hover,
.btn-secondary:hover {
  background: var(--c-gray-50);
  border-color: var(--c-gray-400);
  color: var(--c-gray-900);
}

.btn--secondary:active,
.btn-secondary:active {
  background: var(--c-gray-100);
  border-color: var(--c-gray-500);
}

/**
 * Tertiary button - neutral/outline style
 * Use for cancel, back, secondary actions
 */
.btn--tertiary,
.btn-tertiary {
  background: var(--c-white);
  border-color: var(--c-gray-300);
  color: var(--c-gray-700);
}

.btn--tertiary:hover,
.btn-tertiary:hover {
  background: var(--c-gray-50);
  border-color: var(--c-gray-400);
  color: var(--c-gray-900);
}

.btn--tertiary:active,
.btn-tertiary:active {
  background: var(--c-gray-100);
  border-color: var(--c-gray-500);
}

/**
 * Success button - green
 * Use for confirm, approve, complete actions
 */
.btn--success {
  background: var(--c-success);
  border-color: var(--c-success);
  color: var(--c-white);
}

.btn--success:hover {
  background: var(--c-success-dark);
  border-color: var(--c-success-dark);
}

/**
 * Danger button - red
 * Use for delete, remove, destructive actions
 */
.btn--danger,
.btn-danger {
  background: var(--c-error);
  border-color: var(--c-error);
  color: var(--c-white);
}

.btn--danger:hover,
.btn-danger:hover {
  background: var(--c-error-dark);
  border-color: var(--c-error-dark);
}

/**
 * Danger outline button - red border, no fill
 * Use for delete, remove actions with less emphasis
 */
.btn--danger-outline {
  background: transparent;
  border-color: var(--c-error);
  color: var(--c-error);
}

.btn--danger-outline:hover {
  background: var(--c-error);
  border-color: var(--c-error);
  color: var(--c-white);
}

/**
 * Warning button - amber
 * Use for caution actions
 */
.btn--warning {
  background: var(--c-warning);
  border-color: var(--c-warning);
  color: var(--c-white);
}

.btn--warning:hover {
  background: var(--c-warning-dark);
  border-color: var(--c-warning-dark);
}

/**
 * Info button - blue
 * Use for informational actions
 */
.btn--info {
  background: var(--c-info);
  border-color: var(--c-info);
  color: var(--c-white);
}

.btn--info:hover {
  background: var(--c-info-dark);
  border-color: var(--c-info-dark);
}

/**
 * Ghost button - transparent with border
 * Use for tertiary actions
 */
.btn--ghost {
  background: transparent;
  border-color: var(--c-gray-300);
  color: var(--c-gray-700);
}

.btn--ghost:hover {
  background: var(--c-gray-100);
  border-color: var(--c-gray-400);
}

/**
 * Link button - looks like a link
 * Use for minimal actions
 */
.btn--link {
  background: transparent;
  border-color: transparent;
  color: var(--c-brand);
  text-decoration: underline;
  min-width: auto;
}

.btn--link:hover {
  color: var(--c-mid);
  background: transparent;
}

/* ========================================
   BUTTON SIZES
   ======================================== */

/**
 * Small button
 */
.btn--small,
.btn-small {
  padding: 6px 14px;
  font-size: 0.875rem;
  min-width: 80px;
  border-radius: var(--radius-lg);
}

/**
 * Large button
 */
.btn--large {
  padding: 14px 24px;
  font-size: 1.05rem;
  min-width: 140px;
}

/**
 * Extra large button
 */
.btn--xlarge {
  padding: 16px 32px;
  font-size: 1.125rem;
  min-width: 160px;
}

/* ========================================
   BUTTON SHAPES
   ======================================== */

/**
 * Pill-shaped button (full rounded)
 */
.btn--pill {
  border-radius: var(--radius-pill);
}

/**
 * Square button (minimal rounding)
 */
.btn--square {
  border-radius: var(--radius-sm);
}

/**
 * Icon-only button (circular)
 */
.btn--icon {
  min-width: auto;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-circle);
}

.btn--icon.btn--small {
  width: 32px;
  height: 32px;
}

.btn--icon.btn--large {
  width: 48px;
  height: 48px;
}

/* ========================================
   BUTTON STATES
   ======================================== */

/**
 * Button with loading spinner
 */
.btn--loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid currentColor;
  border-radius: var(--radius-circle);
  border-top-color: transparent;
  animation: spin 0.6s linear infinite;
  color: var(--c-white);
}

.btn--secondary.btn--loading::after,
.btn--ghost.btn--loading::after {
  color: var(--c-brand);
}

/* ========================================
   BUTTON GROUPS
   ======================================== */

/**
 * Button group container
 */
.btn-group {
  display: inline-flex;
  gap: var(--spacing-sm);
}

.btn-group--vertical {
  flex-direction: column;
}

.btn-group--attached .btn {
  border-radius: 0;
}

.btn-group--attached .btn:first-child {
  border-top-left-radius: var(--radius-xl);
  border-bottom-left-radius: var(--radius-xl);
}

.btn-group--attached .btn:last-child {
  border-top-right-radius: var(--radius-xl);
  border-bottom-right-radius: var(--radius-xl);
}

.btn-group--attached .btn:not(:last-child) {
  border-right-width: 1px;
}

/* ========================================
   BUTTON WITH ICON
   ======================================== */

/**
 * Icon inside button
 */
.btn-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn--small .btn-icon {
  width: 16px;
  height: 16px;
}

.btn--large .btn-icon {
  width: 20px;
  height: 20px;
}

/* ========================================
   LEGACY ALIASES
   ======================================== */

/* Portal-specific aliases */
.btn-submit {
  background: var(--c-brand);
  border-color: var(--c-brand);
  color: var(--c-white);
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-xl);
  min-width: 120px;
  cursor: pointer;
  transition: var(--transition-base);
  border: 2px solid var(--c-brand);
}

.btn-submit:hover {
  background: var(--c-mid);
  border-color: var(--c-mid);
}

.btn-cancel {
  background: var(--c-white);
  border-color: var(--c-gray-300);
  color: var(--c-gray-700);
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-xl);
  min-width: 120px;
  cursor: pointer;
  transition: var(--transition-base);
  border: 2px solid var(--c-gray-300);
}

.btn-cancel:hover {
  background: var(--c-gray-50);
  border-color: var(--c-gray-400);
}

.btn-record {
  background: var(--c-white);
  border-color: var(--c-error);
  color: var(--c-error);
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-xl);
  min-width: 120px;
  cursor: pointer;
  transition: var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  border: 2px solid var(--c-error);
}

.btn-record:hover {
  background: var(--c-error);
  border-color: var(--c-error);
  color: var(--c-white);
}

/* ========================================
   iOS FONT SIZE FIX
   ======================================== */

/* Prevent iOS zoom on button tap */
@supports (-webkit-touch-callout: none) {
  .btn,
  .btn-primary,
  .btn-secondary,
  .btn-submit,
  .btn-cancel,
  .btn-record,
  .btn-small,
  button {
    font-size: 16px !important;
  }
}

/**
 * Block button - full width
 */
.btn--block {
  width: 100%;
  min-width: 100%;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 640px) {
  .btn {
    padding: 12px 20px;
    min-width: 100px;
    font-size: 16px;
  }

  .btn--small {
    padding: 8px 16px;
    min-width: 80px;
  }

  /* Keep icon buttons circular */
  .btn--icon {
    padding: 0;
    min-width: auto;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-circle);
  }

  .btn-group:not(.btn-group--vertical) {
    flex-direction: column;
  }

  .btn-group:not(.btn-group--vertical) .btn {
    width: 100%;
  }
}